I just bought a collection (12 complete units) of CV157 SSB converters and truck load of R390's from GA..I am looking for a CV157 tech manual to beg, borrow or steal; even if it's a short time loaner, I will be willing to pay rent for 30 days to make a few copies. Let me know if you can help. 73, Glenn WA4AOS DSM Labs (dot com) 864 684 2956.